The Operating Systems (OS) dedicated to Wireless Sensor Network (WSN) are becoming an important research topic in recent years. This kind of OS has two natures: the resource-aware design and the wireless routing capability. This paper presents a Novel Hybrid Operating System (NHOS) dedicated to WSN. It consists of two parts: a hybrid real-time micro-kernel: LIMOS (LIghtweight Multi-Threading Operating System); a dedicated hybrid wireless protocol stack: CIVIC (Cooperative Inter-Vehicle Intelligent Communication). LIMOS combines the advantages of TinyOS and SDREAM. It has tiny resource consumption and supports the distributed real-time multi-thread applications. CIVIC is a context-aware routing protocol which is implemented to support the infrastructure and ad-hoc network, the hybrid MANET protocol and the multi-support wireless access mediums. This paper demonstrates the key features of NHOS.